==================== Problem Description ====================Let's do the API for Android.It's 4.0 or 4.0.3.Is it possible to run with 4.0 Android 2.3?==================== Solution 1====================Only 2.3 can let 4.0 run, not 4.0 let 2.3 run==================== Solution 2====================Can run, but some 4.0 of the API is not available in 2.3.==================== Solution 3====================In general, you can simply set up a compatible minimum API version and a maximum API version i
skin selection is too large, it will cause the black screen can not start, do not know whether it is a specific reason or all this. My treatment is to choose the skin below WVGA800.To create a project:For the creation of the project, I will directly translate the official website document below:It's easier to use Android studio to create an L Developer Preview project.In the initial creation interface:1. Select Phone and Tablet2. Select API 20+: Android L (Preview) in Minimum SDK.Once created,
and will not be moved to external storage.But your app can be set up to support less than API8:,1. Set Android:instailllocation to Auto or perferexternal in 2. Do not change the minsdkversion, and ensure that your application code is compatible3. In order to compile your application, change your build target to API8, because the low Android library does not recognize the Instailllocation property and does not compile your application.Applications tha
examples of GraldeTop-level build file where can add configuration options common to all Sub-projects/modules.buildscript {Reposito Ries { mavencentral () } dependencies { classpath ' com.android.tools.build:gradle:1.0.0 ' // Note:do not place your application dependencies here; They belong //In the individual module Build.gradle files }}allprojects { repositories { mavenlocal () C9/>maven { url "Http://localhost/repo"}} }Apply plugin
" means not included. If this value is set to
false , the system does not attempt to load any program code when the component is started. The default value is "true".
Applications that do not contain any own code rarely occur. This is possible only if the built-in component classes are used, such as the AliasActivity Activity of the class.
android:hardwareAccelerated
Whether hardware-accelerated rendering is enabled for all
if your application have set either Targetsdkversion or Minsdkversion to "+" or higher.Here, the reason why the hardware acceleration switch is turned on has been found, why this interface in this application will introduce the problem.Learn some of the concepts of Android hardware acceleration first. Android has introduced hardware acceleration from 3.0, that is, drawing with the GPU, designed to get smoother animations smoother scrolling, and bette
Android.webkit in the Java file with Android.webkit2. Use the Search command in the menu to bulk replace. After you've finished replacing, refresh the project and you'll see that all the errors are gone. (It may also be suggested that the minsdkversion version is too low to modify the Androidmanifest.xml file directly as required)Compiling so libraries At this point our Eclipse project is ready to be compiled and run, but it will go off when it start
Http://androidren.com/index.php?qa=320qa_1=android-studio Running the Android program report FAILURE-INSTALL_FAILED_OLDER_SDKAs a general rule, the minimum supported SDK version is higher than the Android version of the current device, which requires modifying the manifest and Build.gradle two places.Modify the "Build.gradle" file under the Source app directory and change the minsdkversion and targetsdkversion to match the Android API version of manif
), treemap is a sorted Binary Tree
5. Java lock Mechanism
ReentrantLock understanding, because I don't know much about it, I don't have to ask questions, such as its simple principle, and the advantages and disadvantages of sychronized.
6. Design Mode
Describe several design patterns you have used and their application scenarios
7. Describe GC and its simple working principle in detail
Measure the test taker's knowledge about the GC recovery time and GC determination mechanism.
8. final, finally
a lot of content to say, but at the beginning, we just need to know a few basic but important points on it.The first things you need to know are:We know that there are many versions of Android, from Android 1.0, which was released in September 2008, to Android 1.5 (cupcake cupcakes), which was later named after the dessert, to the later Android 4.0 with a very high market share (icecream Sandwich Ice Cream Sandwich), to the current October 15, 2014 release of the highest Android version: Androi
example:android:theme="@style/theme.appcompat.light">
Now your activity includes the action Bar is running on Android 2.1 (API level 7) or higher.On API level one or higherThe action Bar is included with all activities Theme.Holo so use the theme (or one of it descendants), which is the default th The EME when either the targetSdkVersion or minSdkVersion attribute are set to "11" or higher. If you don't want the action bar for a activity, set
In recent projects, you need to implement the function of transmitting the apk via Bluetooth, which allows you to search for nearby bluetooth mobile phones and share files. From the perspective of demand, the Bluetooth transmission module provided by the android mobile phone can meet the needs, and the implementation is also very simple. However, although Bluetooth modules are usually configured for mainstream models, the fragmentation of android models is too serious, and the Bluetooth function
our class library is added and can only be modified manually. I am also very helpless. 3. Next we want to change is the app directory Build.gradle, here to note is the app directory Build.gradle, add the following codedependencies { Compile project (': Slidingmenu-master ')}This is also the name of our Import class library. This time we open file--->project StructureYou can see the class library that we imported. We have not finished the word here, and we will make an error when compiling i
types of arrays include color arrays, image arrays, and integer arrays. For details about how to define them, see the frameworks/base/core/res/values/arrays. xml file.4. \ AndroidManifest. xmlCode 4 is the AndroidManifest. xml file of the "helloWorld" project. This file is unique for each application.The AndroidManifest. xml file defines the activity, intent, uses-sdk, uses-permission, service, uses-library, Content provider, Broadcast explorer, and other information of the application.Code 4 A
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